guayule


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guayule

(wīyo͞o`lē, gwä–), multibranched flowering evergreen shrub, Parthenium argentatum, native to the deserts of the SW United States and N Mexico. Growing to 3 ft (1 m) in height, the guayule has leaves and outer stems that are covered with silvery hairs; its small yellow-white composite flowers are produced in clusters. Sometimes used as a landscape plant in dry areas, the shrub has been primarily of interest, since the early 1900s, as an alternative source of rubber, and was widely planted for that purpose in California and the Southwest during World War II. The rubber produced from the latex found in the bark of the stems is used in a number of products, including gloves for individuals allergic to latex from the Pará rubber treePará rubber tree
, large tree (Hevea brasiliensis) of the family Euphorbiaceae (spurge family), native to tropical South America and the source of the greatest amount and finest quality of natural rubber.
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. Resin from the shrub is used as a wood preservative, and pulp from processing is used in particle board. The guayule is classified in the division MagnoliophytaMagnoliophyta
, division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms. The angiosperms have leaves, stems, and roots, and vascular, or conducting, tissue (xylem and phloem).
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, class Magnoliopsida, order Asterales, family Asteraceae.

Guayule

 

(Parthenium argentatum), a rubber-bearing plant of the family Compositae. It grows in the deserts of the northern part of the Mexican plateau, as high as 2,000 m above sea level, and in Texas. It is an evergreen, heavily branched semishrub, reaching a height of 1 m, with a long branched tap root and numerous surface side roots. The leaves measure about 5-8 cm long, with pointed or lobed edges that may be notched or feathered, and contain 3-5 paired lobes. The long cauliform peduncles carry 7-30 small heads of flowers. The leaves, stems, and annual branches are covered with short, thick, silvery hairs. Rubber is found in the roots and the branches. Guayule also contains resin and ester oils.

guayule

[wī′yü·lē]
(botany)
Parthenium argentatum. A subshrub of the family Compositae that is native to Mexico and the southwestern United States; it has been cultivated as a source of rubber.
References in periodicals archive ?
Bridgestone is committed to developing a sustainable guayule natural rubber industry in North America for tire production.
In conjunction, Bridgestone is committed to developing a sustainable guayule natural rubber industry in North America for tyre production.
But a long-term goal is to supplement current guayule germplasm collections with plants that have important traits such as drought and disease resistance.
The latex allergy crisis brought guayule back into the spotlight because its rubber lacks the proteins that cause the most severe allergic reactions.
It is impossible to get a meaningful dose of protein from a guayule latex product; the protein level is just too low, plain and simple.
Guayule latex is a new form of natural rubber latex derived from the guayule bush, a desert plant native to the southwestern United States.
Como empresario, trabajo en Saltillo, Coahuila, donde fue gerente de la Guayulera y exploro la zona de la Sierra La Paila en busca de guayule, excursiones que aprovechaba para colectar plantas.
Al final de ese periodo solo cinco productos estaban tasados: maderas de construccion y ebanisteria, zacaton, chicle, guayule, pieles y cueros sin curtir.
apiculatum, encontrados en este estudio, donde se reportan sus huespedes silvestres, han sido senalados por Garcia (1974) como perjudiciales a plantas de importancia agricola y son: Saissetia oleae, en citricos; Dysmicoccus brevipes, en la pina; el genero Eriococcus dana la parte subterranea del tallo y la raiz del quelite, succiona los jugos de las hojas y las ramas de algunas plantas silvestres como la hierba santa maria (Asteracea) y retama (Fabacea) y la familia Ortheziidae, perjudicial a los citricos, cana de azucar y guayule.
Es de notar que entre los huicholes se utiliza el latex de la planta que llaman tsacurra, es decir la mariola (Parthenium incanum), que es de la misma familia que el guayule, para curar el mal de estomago y de garganta, Armando Casillas Romo, Nosologia mitica de un pueblo.
Growth of guayule (Parthenium argentatum) in saline soil was equally enhanced by either the addition of phosphorous or inoculation with AMF (Pfeiffer & Bloss 1988).
20 What important product was made from the roots of the Russian dandelion and the Texan guayule shrub when the usual source was lost to the Allies during World War II?